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annotate mde/gui/WMScreen.d @ 173:a1ba9157510e

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Enabled ServiceContentList to call its callbacks when its value changes. Tried to fix some other bugs, but this is not a very clean commit, due to wanting to make some big changes to enable better use of invariants next.
author Diggory Hardy <diggory.hardy@gmail.com>
date Sat, 08 Aug 2009 15:53:10 +0200
parents 7f7b2011b759
children 3d58adc17d20
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1 /* LICENSE BLOCK
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2 Part of mde: a Modular D game-oriented Engine
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3 Copyright © 2007-2008 Diggory Hardy
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4
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5 This program is free software: you can redistribute it and/or modify it under the terms
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6 of the GNU General Public License as published by the Free Software Foundation, either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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10 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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11 See the GNU General Public License for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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15
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16 /******************************************************************************
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17 * A gui manager class using mde.setup.Screen and mde.input.Input.
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18 *
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19 * This is the module to use externally to create a graphical user interface
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20 * (likely also with content modules).
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21 *****************************************************************************/
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22 module mde.gui.WMScreen;
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23
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24 import mde.gui.WidgetManager;
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25 import mde.gui.WidgetLoader;
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26 import mde.gui.widget.Ifaces;
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27
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28 import mde.setup.Screen;
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29 import mde.input.Input;
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30
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31 import tango.io.Console; // to print exception stack-trace
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32 import tango.util.log.Log : Log, Logger;
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33
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34 private Logger logger;
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35 static this () {
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36 logger = Log.getLogger ("mde.gui.WMScreen");
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37 }
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39 /******************************************************************************
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40 * The widget manager.
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41 *
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42 * This provides a layer on top of WidgetLoader, handling input and rendering.
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43 * Other functionality is contained in the super class, to simplify supporting
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44 * new input/graphics libraries.
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45 *
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46 * Currently mouse coordinates are passed to widgets untranslated. It may make
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47 * sense to translate them and possibly drop events for some uses, such as if
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48 * the gui is drawn to a texture.
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49 *
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50 * Public non IWidget* methods should be thread-safe, even to the same
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51 * instance (by locking on a mutex).
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52 *****************************************************************************/
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53 scope class WMScreen : AWidgetLoader, Screen.IDrawable {
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54 /** Construct a new widget manager.
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55 *
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56 * Must be run after static this.
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57 *
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58 * params:
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59 * fileName = Name of file specifying the gui, excluding path and extension.
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60 */
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61 this (char[] file) {
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62 // Doesn't need a lock - cannot conflict with other class functions.
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63 super(file);
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64
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65 Screen.addDrawable (this);
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66 // Events we want to know about:
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67 input = Input.singleton;
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68 input.addMouseClickCallback(&clickEvent)
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69 .addMouseMotionCallback(&motionEvent);
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70 }
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71 ~this () {
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72 // Make sure the keyboard is not locked in text-entry mode.
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73 input.setLetterCallback (null);
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74 }
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75
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76 /** Draw the gui. */
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77 void draw() {
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78 synchronized(mutex) {
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79 debug (mdeDrawEvents)
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80 logger.trace ("drawing");
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81 wmDrawWidgets();
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82 }
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83 }
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84
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85 /** For mouse click events. */
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86 void clickEvent (ushort usx, ushort usy, ubyte b, bool state) {
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87 try {
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88 mutex.lock;
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89 scope(exit) mutex.unlock;
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90 wmMouseClick (cast(wdabs) usx, cast(wdabs) usy, b, state);
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91 } catch (Exception e) {
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92 logger.error ("clickEvent: exception processing event: {}", e.msg);
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93 e.writeOut(delegate void(char[]s){ Cerr(s); });
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94 }
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95 }
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96
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97 /** For mouse motion events. */
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98 void motionEvent (ushort scx, ushort scy) {
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99 try {
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100 mutex.lock;
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101 scope(exit) mutex.unlock;
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102 wmMouseMotion (cast(wdabs) scx, cast(wdabs) scy);
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103 } catch (Exception e) {
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104 logger.error ("motionEvent: exception processing event: {}", e.msg);
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105 }
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106 }
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107
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108 /** Notification of externally-caused screen resize.
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109 *
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110 * Should be called before createWidgets to prevent widgets being squashed
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111 * to min-dims on loading (losing saved dimensions of columns, etc). */
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112 void sizeEvent (int nw, int nh) { // IDrawable function
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113 mutex.lock;
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114 scope(exit) mutex.unlock;
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115
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116 w = cast(wdim) nw;
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117 h = cast(wdim) nh;
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118 matchMinimalSize;
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119
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120 if (!childRoot) return; // if not created yet.
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121 childRoot.setWidth (w, -1);
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122 childRoot.setHeight (h, -1);
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123 childRoot.setPosition (0,0);
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124 }
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125
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126 protected:
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127 final override void setLetterCallback(void delegate(ushort, char[]) dlg) {
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128 input.setLetterCallback (dlg);
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129 }
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130
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131 final override void preSave () {
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132 if (keyFocus) {
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133 keyFocus.keyFocusLost;
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134 keyFocus = null;
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135 input.setLetterCallback (null);
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136 }
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137 }
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139 Input input; // input singleton
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140 }